Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
A rare element of the vanadium group, first found in a varietyof the mineral columbite occurring in Connecticut, probably atHaddam. Atomic weight 94.2. Symbol Cb or Nb. Now more commonly calledniobium.
Share your knowledge with the community
Browse our collection of 300,000+ community-written definitions
